Support for loading pallets and the like



May 19, 1970 P. ERISMANN v SUPPORT FOR'LOADING PALLETS AND THE LIKEFiled Feb. 9, 1963 2 Sheets-Shet 1 Fig. 2

0A NAVY Fig. 4

Fig.3

INVENTOR: Paul Er/Zsmann BY mdmtk PM.

May 19, 1970 P. ERISMANN SUPPORT FOR LOADING PALLETS AND THE LIKE 2Sheets-Sheet 2 Filed Feb. 9, 1968 INVENTOR: Paul 'rbmemv BY mm M HM.

3,512,653 SUPPORT FOR LOADING PALLETS AND THE LIKE Paul Erismann, 4Alpenquai, Lucerne, Switzerland Filed Feb. 9, 1968, Ser. No. 704,329Int. Cl. A47f 5/10 US. Cl. 211-176 4 Claims ABSTRACT OF THE DISCLOSURE Asupport for loading pallets and the like wherein a plurality of verticalcolumns are provided each having spaced catch-recesses therein. Shelfsupports having a plurality of horizontally arranged suspension pins aremounted vertically adjustable in the catch recesses. The pins have ahead and the catch recesses for accommodating the suspension pins eachhave the form of a vertically extending slot with a widened upper endportion for the insertion of said head and at the bottom thereof anextension narrower than the diameter of a suspension pin so that at thepoints of transition from said slot accommodating said suspension pin tosaid narrower extension two shoulders are formed spaced horizontallyapart for supporting laterally free from play the suspension pin. Meansare provided for locking the supports against accidental displacement.

This invention relates to a frame with vertical hollow columns and withvertically adjustable shelf supports fitted to catch-recesses in thehollow columns, having a multiplicity of suspension pins arrangedhorizontally and each provided with a head, the catch-recesses foraccommodating the suspension pins each having the form of a verticallyextending slot with a widened upper end for inserting the head of thesuspension pin. The frame may be primarily intended for storing goods ofdifferent kinds; in particular it is designed for the application ofloading pallets, on which the goods to be stored can be stacked.

The frame in accordance with the invention differs es sentially fromknown frames of a similar kind and used for the same purposes, in thateach catch-recess has at the bottom an extension which is narrower thanthe diameter of the suspension pin, so that at the point of transitionfrom the slot accommodating the suspension pin to the narrowedextension, there are formed two shoulders, spaced apart horizontally,for lateral support without play of the inserted suspension pin.

The suspension pin may advantageously be formed cylindrical at least inits lower half, and the said shoulders may be made sloping inwards anddownwards, while the contour of the shoulders may advantageously extendalong two portions of a semicircle whose diameter corresponds to thewidth of the slot. In order to be able to carry out the suspension andrelease of the shelf supports without difficulty, the width of the slotaccommodating the suspension pins is preferably made considerably largerthan the diameter of the suspension pin, while the width of the narrowedextension at the top may be less than half the diameter of thesuspension pin.

In order to facilitate the lifting of the shelf supports United StatesPatent 0 "ice from the catch-recesses, in a preferred embodiment theuppermost point of the periphery of the head of each suspension pin isarranged at not more than the height level of the uppermost geometricalenvelope line of the relevant suspension pin. With this arrangement theshelf supports to be released can be lifted till the suspension pinsabut against the upper end of the catch-recesses and then can bereleased from the frame columns, without any interference from the headsof the suspension pins.

In a particularly advantageous form of embodiment of the frame inaccordance with the invention the shelf supports each have two sparsextending horizontally and parallel to one another, each fixed at theends with a vertical angle member |whose arms straddle the appropriatecolumn. There may be accommodated on an arm of each angle member two ormore suspension pins extending at right angles to the longitudinaldirection of the shelf support spar, superimposed at a distance apartfrom one another, in such a way that they project into the space boundedby the two arms of the angle member and can engage in two differentcatch-recesses of the column. In this way there is obtained asatisfactory, stable and play-free connection between the columns andthe shelf support spars, so that it is only necessary to connect thecolumns present at the two ends of the spar in pairs by additionalconnecting stays, which extend transversely to the longitudinaldirection of the spar.

This invention also provides a form of embodiment of the framedescribed, in which an effective security is obtained against accidentallifting up of the shelf supports and consequent lifting off of thesuspension pins, in a very simple manner.

The measures provided for obtaining the said security consist inaccordance with the invention in that at each arm of each angle memberwhich has one or more suspension pins, at least one perforation isprovided, the uppermost edge part of which has at least approximatelythe same position as the uppermost edge part of one of thecatch-recesses of the column, and that a locking member releasable bythe perforation of the angle member and by the catch-recess justmentioned, is inserted in order to secure the angle member against beinglifted up and hence the suspension pin being accidentally lifted off.

The locking member may advantageously have on the outside of therelevant arm of the angle member a handgrip portion hanging downwards inthe rest position, and at the inner end in the hollow space of thecolumn an upwardly directed projection gripping behind the uppermostedge part of the relevant catch-recess. Here the part of the lockingmember passing through the perforation of the angle member and throughthe catch-recess of the column may be a pin or bolt of circular section,the said bolt being rotatable round its longitudinal axis in theperforation of the angle member and the said perforation having a slottype extension, through which the projection at the inner end of thelocking member can pass,- after it has been brought into a suitableposition by the rotation of the bolt by means of the hand-grip part, thesaid position being other than a position directed upwards.

Other objects and details of the invention will appear from the claims,from the detailed description which now follows, and from the attacheddrawings, which represent the invention partly diagrammatically andpurely by way 3 of example. Two examples of embodiment of the frame inaccordance with the invention and a partial variant will be described inmore detail below with reference to the drawings, so as to make thefeatures of the invention, further details, and the advantages thereof,clear to the person skilled in the art.

FIG. 1 shows a part of a first example of embodiment of the frame inaccordance with the invention in side elevation;

FIG. 2 represents the same frame in a front view, seen from the right inFIG. 1;

FIG. 3 shows on a larger scale a detail of FIG. 2, that is to say one ofthe columns and the end part of a shelf support spar arranged thereonvertically adjustable;

FIG. 4 is a horizontal section along the line IVIV in FIG. 3;

FIG. 5 is a vertical section along the line VV in FIG. 4, on a largerscale;

FIG. 6 shows a cross-section along the line VIVI in FIG. 5 through anindividual suspension pin, which is in engagement with a catch-recess ofthe column;

FIG. 7 shows a similar cross-section through a variant embodiment of thesuspension pin;

FIG. 8 is a similar representation to FIG. 3 of a second example ofembodiment of the frame in accordance with the invention, differing fromthe first example by measures and means for securing the shelf supportspar against accidental release from the column;

FIG. 9 is a vertical section along the line IXIX in FIG. 8;

FIG. 10 shows the locking member serving for the securing, in itsposition visible in FIG. 9, but on a larger scale;

FIG. 11 is a view of the locking member seen from the left in FIG. 10;

FIG. 12 is a representation similar to FIG. 8, but on a larger scale, ofpart of the angle member with the perforation for inserting the lockingmember in accordance with FIGS. 10 and 11.

The frame, only diagrammatically represented in FIGS. 1 and 2, has anumber of vertical columns 11 which are interconnected in pairs byhorizontal transverse stays 12 and crossed stays 13, as shown in FIG. 1.In the front view in FIG. 2 there can be seen only the front one of eachpair of columns 11 interconnected by the transverse stays 12 and 13, therear one being hidden by the said front one. The front columns 11 of twosuccessive pairs of columns are interconnected by a multiplicity ofhorizontal shelf support spars 14. In exactly the same way the rearcolumns 11, not visible in FIG. 2, are interconnected by horizontalshelf support spars. The front and rear spars 14 are located in eachcase at the same height level, and together form a shelf support forapplying loading pallets on. In this case a direct transverse connectionbetween the spars 14 on each shelf support is superfluous. Depending onthe purpose for which the frame is intended, however, the spars 14 ofeach shelf support may nevertheless be interconnected by plates,gratings, transverse supports and so on.

The shelf support spars 14 are releasably connected with the columns 11and are vertically adjustable. The following means and measures areprovided for this purpose.

The columns 11 are made hollow in known manner and in the example ofembodiment represented are of U- shaped cross-section with twolongitudinal bent corners, as can be seen in FIG. 4. The web or end facesurface lying opposite the open side of each column 11, is provided withtwo adjacent rows of catch-recesses 15 (FIGS. 3, 4 and 7), each havingthe form of a vertically extending slot 15a with a widened circularupper end part 15b. At the bottom each catch-recess 15 has an extension150, narrower than the slot 15a; in the example represented it issemi-circular. At the point of transition between the slot 15a and thenarrower extension 15c two shoulders 15d are formed, sloping inwards anddownwards.

As clearly shown by FIGS. 3 and 7, the contour of the the shoulders 15dextends along two arcs of a semi-circle, whose diameter corresponds tothe width of the slot 15a. The width of the narrow extension at the top,that is to say at the point where it joins the shoulders 15d, is ratherless than half the width of the slot 15a. The diameter of the widenedcircular end part 15b is about twice the width of the slot 15a. Thesuccessive catch-recesses of each vertical row are all the same distanceapart. Horizontally, the catch-recesses 15 are each at a considerabledistance from the longitudinally-extending bend corners of theappropriate column 11.

Each of the shelf support spars 14 is fixed at each of its ends to anangle member 16 extending vertically. The spar 14 is here at rightangles to one arm of the angle member 16, while the other arm extendingparallel to the longitudinal direction of the spar 14 projects beyondthe relevant end of the spar. The angle members 16 are intended here tobe placed outwardly straddling the columns 11, the second-mentioned armpartly gripping over the web or end face surface (provided withcatch-recesses 15) of the columns 11, as shown in FIGS. 3 and 4. Thereare welded to the last-mentioned arms two cylindrical suspension pins17, spaced apart one above the other, the longitudinal axes of whichextend horizontally and at right angles to the longitudinal direction ofthe relevant spar 14. The suspension pins 17 project into the spacebounded by the two arms of the relevant angle member 16 and each have aplate-shaped head 18.

The diameter of the head 18 is less than that of the widened end part15b of each catch-recess 15, but greater than the width of the slot 15a,Which in turn is very considerably, e.g. 5 to 10%, greater than thediameter of the shank of the suspension pin 17. In order to facilitatethe insertion of the head 18 in the widened end part 15b, the peripheryof the head 18 is made frusto-conical. The distance of the head 18 fromthe arm (of the angle member 16) supporting the relevant suspension pin17, is slightly greater than the wall thickness of the columns 11. FIGS.5 and 6 show that the suspension pin 17 and the associated head 18 arearranged eccentrically in relation to one another, so that the uppermostpoint of the periphery of the head 18 is at the same height level as theuppermost geometrical envelope line of the suspension pin 17.

The axes of the suspension pins 17 fixed to the same angle member 16 areat a distance apart which is a wholenumber multiple of the distanceapart from one another of corresponding points of the verticallysuccessive catchrecesses 15. In the preferred example of embodimentrepresented the center distances of the suspension pins 17 is such thatthey can be inserted and suspended in one catchrecess 15 and the nextone above, as shown in FIG. 3. If desired, the two suspension pins 17may, however, also be at a greater distance apart, so that they jump,not just over one catch-recess 15, but over two or more. Similarly, ifrequisite, more than two suspension pins 17 can be accommodated insuperimposition at each angle member 16.

When the shelf support spars 14 are correctly applied to the columns 11and particularly when they are supporting a load, the cylindrical lowerperipheral part of each suspension pin 17 is applied free from lateralplay on the two shoulders 15d of the relevant catch-recess 15. As, thatis to say, the two shoulders 15d of each catchrecess 15 are at adistance apart from one another horizontally, the suspension pins 15 arenot merely supported in the vertical direction, but are also securedagainst horizontal movement in the longitudinal direction of the spars14, and indeed all the more so the greater the load resting on the spars14. This security against horizontal movement is due to the shoulders15d, without the suspension pins 17 being applied against the verticallyextending flanks of the slot 150. The suspension pins 17 are thereforenot clamped fast in the catch-recesses 15, so that it is easy to lift upthe pins 17 at any time for the purpose of adjusting the height of thespars 14, since all that is necessary is to lift first one end and thenthe other end of each spar, until the heads 18 of the relevantsuspension pins 17 can be moved out of the widened upper end part 15b ofthe catch-recesses 15. This is facilitated by the eccentric arrangementof the head 18 of each suspension pin 17, as after the upward movementof the suspension pin 17 until it abuts against the upper end f thecatch-recess 15, the head 18 cannot grip round the upper edge of thewidened end part b. As the width of the slot 15a of each catch-recess 15is considerably greater than the diameter of the suspension pin 17, thetwo ends of the spar 17 to be adjusted need not be simultaneously raisedby the same amount. It is possible to lift up or suspend the two ends ofeach spar 14 in succession and independently of one another.

When at least two or more shelf support spars 14 are inserted, the framedescribed is very stable and completely free from wobble. Thanks to thesupport free from lateral play, described above, of each suspension pin17 on the two associated shoulders 15d of the relevant catch-recess 15,the columns 11 are held firm by the shelf support spars 14. The factthat each end of the spar 14 is connected by means of two suspensionpins arranged at a considerable vertical distance apart, with theadjacent column 11, adds considerably to, the strength of the frame,since the application, free from lateral play, of each of thesesuspension pins on two shoulders 15d prevents any deviation of thecolumn from the vertical, as long as the suspension pins are applied onthe said shoulders. This is ensured all the more in proportion as theload on the shelf supports increases. The satisfactory connectiondescribed between the columns 11 and the shelf support spars 14 istherefore obtained by a locking action and becomes all the better as theload on the shelf supports is increased.

It might perhaps be thought that an extraordinarily high degree ofprecision is required for the formation of the catch-recesses and thesuspension pins, and also for their arrangement, in order to be alwaysable to obtain the simultaneous application of all four or moresuspension pins of each shelf support spar on the associated shoulders15d of the catch-recesses 15. This, however, is not so. First of all itmust be remembered that the frame is still stable even when it mighthappen that only one single suspension pin 17 were acting as a supportat each end of the spar 14. If then the shelf supports were heavilyloaded it could happen that the shoulders 15d carrying one suspensionpin 17 yielded slightly under the load, but this would only mean thatthey would adapt themselves better to the shape of the relevant pin 17and then finally the second suspension pin 17 of the same angle member16 would also come to rest on the shoulders assigned for this purpose ofthe relevant catch-recess 15.

A further advantage of the frame described which may be mentioned isthat the angle member 16 and the two.

or more suspension pins 17 fixed to it oppose any bending of the middlepart of each shelf support spar 14, because the upper suspension pins 17prevent the upper end of the relevant angle member 16 from moving awayfrom the adjacent column 11, i.e. in FIG. 3 moving to the right, whichwould cause the spar 14 to bend. On the other hand the suspension pins17 and the angle members 16 prevent any bending of the columns 11, ifthe shelf support spar 14 should nevertheless ever bend downwards undertoo heavy a load. Thanks to the particular upper pin 17 concerned thecolumn 11 is then, in 'fact, drawn inwards, i.e. in FIG. 3 to the right,but simultaneously the particular lower suspension pin 17 concerned thenforces the relevant column 11 outwards to approximately the same extent,i.e., in FIG. 3 to the left, so that practically no noticeabledeflection of the column 11 out of the vertical takes place. The tensileand bend strength of the columns 11 is furthermore hardly affecteddeleteriously by the catch-recesses 15 at all, as all thesecatch-recesses are arranged at a distance from the longitudinal edges ofthe columns, so that they do not involve any interruptions or otherweakenings in the strength of the important longitudinal edge parts.

If the U-section of the columns 11 represented should for some purposesof application, not ensure sufficient strength, the said columns 11 maybe given a C-section, i.e. the free ends of the flanges of the U-sectionin FIG. 4 are each bent over further in relation to one another. Thecolumns then have four longitudinal corners each.

As each column has two rows of catch-recesses 15 and the angle members16 in each case when fixed to the columns leave the second row ofcatch-recesses completely free, as shown in FIG. 3, shelf support spars14 can be fitted on the right and on the left of the same column and atthe same height or at different height levels (FIG. 2).

As the front columns 11 visible in FIG. 2, and also the correspondingrear columns of the frame, do not have to be connected by cross-ties inorder to give the frame the requisite stability, all the shelf supportsare readily accessible both from the front and also from the back, ifthe frame is standing by itself in a clear space. On the other hand, itis possible to arrange the front and rear columns 11 of each pair ofcolumns in like manner, so that the web or end face surfaces providedwith catchrecesses 15 are always turned to the front and consequentlyboth the front and also the rear shelf support spars 14 can be fittedfrom the front, i.e. in FIGURE 1 from the right, and can be removed fromthe front.

If requisite the suspension pins may have the form represented in FIGURE7, where a cylindrical portion 17a is arranged so axially with the head18. At its side facing upwards the cylindrical portion 17a is, however,provided with a beading 19, extending at least to the uppermost point ofthe periphery of the head 18. The beading 19 can, if desired, beproduced merely by applying material by welding or hard soldering. Itsduty is to prevent, during an upward movement of the suspension pin, thehead 18 from being able to grip behind the upper edge of the widened endpart 15b of the catch-recess 15, if it is desired to lift up the pin outof the catch-recess.

When loading the frame described or removing loads from it, by means ofmechanical conveying devices, such as fork lift stackers for instance,the danger occurs in some circumstances of a shelf support spar beingunintentionally raised and the suspension pins at one end or both endsof the spar being lifted out of the catchrecesses of the columns. Thismay cause an upset of the articles stored on the shelf supportsconcerned and possibly also of the suspended shelf support spar, whichmight result in material losses and physical injuries. In order to avoidthis the following measures are adopted in the second example ofembodiment of the frame in accordance with the invention as in FIGS. 8to 12.

Each of the angle members 16 has in each arm, which is provided with thesuspension pins 17, two equal perforations 20 and 20' (FIGS. 8, 9 and12), one of which is arranged in such a way that its uppermost edge parthas at least approximately the same position as the uppermost edge partof a catch-recess 15 of the column 11. This is the case in the exampleof embodiment represented with the upper perforation 20. The lowerperforation 20' could incidentally be omitted; its purpose will beexplained later.

A locking member 21 is inserted through the said upper perforation 20and through. the catch-recess 15 lying below this. The latter has ahand-grip part 22 hanging downwards on the outside of the angle member16, a pin or bolt 23 passing through the perforation 20 and thecatch-recess 15 and a projection 24 projecting upwards at the inner endof the same, which grips behind 7 the uppermost edge patr of thecatch-recess 15. The handgrip part 22 and the bolt 23 consist of asingle bar type piece of material of circular cross-section, which isbent through 90 between the said parts. The projection 24 is formed by apin inserted radially in the bolt 23.

The perforation 20 consists of a circular bore 20a corresponding to thecross-section of the bolt 23 and a slot type extension 2012, which isarranged radially to the bore 20a and extends horizontally. The slottype extension 2012 is given such dimensions that the projection 24 canpass through it, when the said projection has been brought out of itsupwardly pointing direction into a horizontal position by an appropriaterotation of the locking member 21, in which horizontal position thehand-grip part 22 assumes the position indicated in chain line in FIG.8. The cylindrical peripheral surface of the bore 20a forms a bearingfor the rotatable support of the bolt 23.

When the locking member 21 is inserted as shown in solid line in FIG. 8and in accordance with FIG. 9, the hand-grip part 22 automatically hangsvertically downwards under the influence of gravity, while theprojection 24 simultaneously projects vertically upwards. As theprojection thereby engages behind the uppermost edge part of therelevant catch-recess in the hollow space of the column 11, the lockingmember is secured against slipping out of the said catch-recess 15 andout of the perforation 20. In this position the locking member 21simultaneously secures the angle member 16 against any movement upwards,so that any lifting up of the suspension pin 17 out of the catch-recess15 assigned to its of the column 11 is prevented.

If it is desired to release the angle member 16 and the pins 17 from thesaid securing action against lifting, the handle 22 is gripped andswivelled in the direction of the arrow P in FIG. 8, into the positionshown in chain line, by which the bolt 23 is rotated round itslongitudinal axis. This brings the projection 24 exactly behind the slot20b of the perforation 20, so that the bolt 23 can be drawn out of thisperforation. Now the angle member 17 can be raised and released bylifting the pipes 17 from the associated catch-recess 15 of the column11.

In order to render the securing action operative again after theapplication of the angle member 16 and the suspension of the pins 17,the reverse is done. With the handle 22 in the horizontal position thelocking member 21 is inserted in the conjugate perforation 20 andthrough the catch-recess 15 lying behind this. The handle 22 is thenreleased, on which under the influence of gravity it automaticallyassumes its rest position hanging downwards, and thereby the projection24 engages behind the uppermost edge part of the relevant recess 15.

The means and measures described for securing the angle member 16 to thecolumn 11 are simple in construction and therefore very effective.Furthermore the locking member 21 is simple to use, and the easilyvisible handle 22 means that the position in which the locking member isplaced can be identified even from a considerable distance, and it canbe checked that it is in its correct position on the inside for ensuringsecurity.

The second perforation 20' (the lower one in FIGS. 8 and 9) in the anglemember 16, serves to accommodate the bolt 23 of the locking member 21 inthe case when the right and left ends of the particular shelf supportspar 14 have exchanged places. This then means that in suspending thepins 17 on the column 11 the second perforation 20' comes into positionin front of one catch-recess 15 in such a way that the uppermost edgeparts of the perforation and of the relevant catchrecess 15 have atleast nearly the same position, so that even in this case security canbe obtained by means of the locking member 21 in the manner describedabove.

If requisite the perforation 20 in the angle member 16 could also bearranged in such a way that the locking member 21 inserted through itcomes into engagement with the same catch-recess 15 in which asuspension pin 17 also engages. This could be the case for instance withthe catch-recess 15 in FIGS. -8 and 9 accommodating the lower suspensionpin 17.

I claim:

1. A support for loading pallets and the like comprising a frame havinga plurality of vertical columns each having spaced catch-recess therein,vertically adjustable shelf supports mounted in said catch recesses, aplurality of horizontally arranged suspension pins cylindrical in theirlower halves on each of said shelf supports, each of said pins having ahead, each of said catch recesses for accommodating said suspension pinshaving a vertically extending slot with a widened upper end portion forthe insertion of said head and at the bottom of said slot an extensionthereof narrower than the diameter of a suspension pin so that at thepoints of transition from said slot accommodating a suspension pin tosaid narrower extension two concave curved shoulders sloping inwardlyand downwardly are formed spaced horizontally apart for supportinglaterally free from play said suspension pin, the contour of saidshoulders extending along two arcs of a semicircle having a diametercorresponding to the width of said slot, said slot having a widthgreater than the diameter of said suspension pin and the width of saidnarrower extension being less at the top thereof than half the diameterof a suspension pin, each of said shelf supports comprising a verticallyextending angle member having two arms which straddle an associatedcolumn, one of said arms having at least one of said suspension pinsprojecting into the space bounded by said two arms, a spar fixed at itsends to angle members upon two spaced columns, each of said anglemembers having at least one suspension pin and a perforation whoseuppermost edge part has approximately the same position as the uppermostedge part of one of said catch recesses of the associated column and alocking member is releasably inserted through said perforation andthrough said associated catch recess to secure said angle member againstbeing lifted up and securing said suspension pin from being accidentallydisplaced, said locking member having a handle located outside of theangle member hanging downwardly in rest position and is provided at theinner end within the space of the associated column with a projectionengaging behind the uppermost edge part of the associated catch recess.

2. A support for loading pallets and the like comprising a frame havinga plurality of vertical columns each having spaced catch-recessestherein, vertically adjustable shelf supports mounted in said catchrecesses, a plurality of horizontally arranged suspension pinscylindrical in their lower halves on each of said shelf supports, eachof said pins having a head, each of said catch recesses foraccommodating said suspension pins having a vertically extending slotwith a widened upper end portion for the insertion of said head and atthe bottom of said slot an extension thereof narrower than the diameterof a suspension pin so that at the points of transition from said slotaccommodating a suspension pin to said narrower extension two concavecurved shoulders sloping inwardly and downwardly are formed spacedhorizontally apart for supporting laterally free from play saidsuspension pin, the contour of said shoulders extending along two arcsof a semicircle having a diameter corresponding to the Width of saidslot, said slot having a width greater than the diameter of saidsuspension pin and the width of said narrower extension being less atthe top thereof than half the diameter of a suspension pin wherebyjamming of said pin is prevented.

3. A support as set forth in claim 2 wherein each of said shelf supportscomprises a vertically extending angle member having two arms whichstraddle an associated column, one of said arms having at least one ofsaid suspension pins projecting into the space bounded by said two arms,a spar fixed at its ends to angle members upon two spaced columns, eachof said angle members having at least one suspension pin and aperforation whose uppermost edge part has approximately the sameposition as the uppermost edge part of one of said catch recesses of theassociated column and a locking member is releasably inserted throughsaid perforation and through said associated catch recess to secure saidangle member against being lifted up and securing said suspension pinfrom being accidentally displaced.

4. A support as set forth in claim 3 wherein said locking member havinga handle located outside of the angle member hanging downwardly in restposition and is provided at the inner end within the space of theassociated column with a projection engaging behind the uppermost edgepart of the associated catch recess.

References Cited UNITED STATES PATENTS 2,639,043 5/1953 Dunham 858.63,070,237 12/1962 Fullerton et a1. 211-176 3,144,944 8/ 1964 McConnell21 1--148 3,392,848 7/1968 McConnell et a1 211-176 EDWARD C. ALLEN,Primary Examiner

